Boat



June 24, 19.30. A cmPPER I 1,766,360

BOAT

Filed Dec. 15, 1928 INVENTOR ATTORNEY Patented June 24, 1930 TENT ALEXANDER G. SCHIPPER, OF HAMILTON, OHIO BOAT Application filed December 15, 1928. Serial No. 326,355.

This invention relates to improvements in boats and has for an object the provision of a boat hull whose bottom is constructed. to provide an air chamber between the huh :3 and the water, the construction of said bottom providing a wall which surrounds the air chamber and prevents the escape of air, and in addition, provides a small water displacement surface for the bottom of the hull and reduces friction.

'15 construction of the hull resisting tendency of the bow to elevate or the stern of the boat to squat.

With the above and other objects in View, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawing and pointed out in the appended claim.

In the drawing v Figure 1 is a longitudinal sectional view showing a boat hull constructed in accordance with the invention.

Figure 2 is a bottom plan view of the hull.

Figure 3 is an elevation looking at the bow of the boat.

Figures 4: and 5 are sectional views taken respectively on the lines 4-4: and 5-5 of Figure 1.

Referring to the drawing in detail wherein like characters of reference denote corresponding parts, the hull which is indicated at 10 may be of various shapes, the invention residing in the construction of the bottom of the hull. This bottom is inclicated at 11 and is substantially flat from' to materially reduce friction when the boat is under way.

The depression formed in the bottom of the boat'is provided with a transverse step 14 which divides the depression into a forward shallow section 15 and a rearward relatively deep section 16, so that the bow will not be disposed at an upward incline, and the motive power of the boat will be exerted in a horizontal direction over the top of the water instead of against the water.

The under surface of the bow is upwardly curved as shown at 17 so as to reduce resistance, while a central longitudinally disposed rib 18 provided upon the under surface of the bow acts to part or cleave the water to facilitate passage of the boat therethrough.-

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claim.

Having described the invention, what is claimed is:

In a boat, a hull having a substantially flat bottom extending from a point adjacent the bow to the stern, and said bottom having a longitudinally disposed substantially oval-shaped concavity therein whose edges define a closed air pocket when the boat is in the water, and a step extending transversely of the bottom at a point to one side of the transverse center of said cavity to divide the pocket into a forward shallow section and a rearward relatively deep section.

In testimony whereof I affix my signature.

ALEXANDER C. SCHIPPER. 

